Test all appliances
Systematic functional tests can reveal flaws at an early stage and allow enough leeway to fix the issues.
Please take all the time you need for the final functional tests. Ultimately, it can take time for the fridge to be tested in all its operating modes, for example. Testing the heating and hot water supply should be a little quicker. Do all gas rings on the cooker burn with the same steady flame?
Switch all lighting devices on and off. Are all reading spotlights working? You might find a spare bulb that fits while sorting through the vehicle. Or you can purchase them from Dethleffs dealerships.
Also check whether the batteries in all remote controls for the vehicle’s television, satellite receiver and air-conditioning are still working.